Nozzle guide-passage



c. w. DAKE. NOZZLE GUIDE PASSAGE.

APPLICATION FILED APR; 12, 1920- 1. 397,085,, Patented Nov. 15, 1921.

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CHARLES W. DAKE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE PYLE-NATIONAL 00M.- PANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

NOZZLE GUIDE-PASSAGE.

Application filed April 12, 1920.

To all whom it may concern:

Be it known that 1, CHARLES W. DAKE, a citizen or the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Nozzle Guide-Passages of which the following is a specification. v

My invention relates to improvements in nozzle and guide passages for steam turbines and the like and has for one object to provide a new and improved form of turbine and nozzle and guide passage. Another object is to provide a two ring compact turbine wheel arrangement whereby one nozzle and group of guide passages will be enabled to provide the motive fluid for the buckets of two parallel groups mounted on a single turbine wheel. Another object is to provide a removable accurately fitted nozzle block so that when the nozzle wears it may be easily replaced. Another object is to provide an arrangement whereby the steam in the motive fluid may be ledthrough two separate bucket groups with a minimum of disturbance to its flow. Another object is to provide an arrangement whereby the steam from the nozzle may pass through one group of buckets, may then be deflected. passing through another group of buckets and then be discharged, all with a minimum of inter ference and loss by friction and inertia and the like. Other objects will appear from time to time throughout the specification and claims.

My invention is illustrated more or less diagrammatically in the accompanying drawings, wherein:

Figure 1 is a section through the nozzle and guide assembly and through a part of the turbine wheel;

Fig. 2 is a section along the line 22 of Fig. 1;

Fig. 3 is a section along the line 33 of Fig. 1;

Fig. Fig. l; l a

Fig. 5 are detail views in part section of the removable nozzle;

Like parts are indicated by like characters throughout.

4 is a section along the line 4.4: of

Serial No. 373,171.

A is the turbine housing wall, mounted upon which is the nozzle and guide passage bracket A held in place by any suitable means, as for instance, the nuts and bolts A This bracket is located at one side of and immediately adjacent the periphery of the turbine wheel A This turbine wheel has mounted on either side a series of buckets A", A, so that there are two bucket rings arranged side by side with the wheel between them and these buckets are adapted for a radial flow of the motive fluid. bracket A has integral with it a steam chest 13 communicating with the motive fluid or steam supply pipeB at one end and with a nozzle socket B at the other end. This nozzle socket extends clear through the steam chest and is closed at one end by a plug B and contains the nozzle B This nozzle is slotted at B and is held detachably in position in the socket by a pin B which passes through the wall of the socket and engages a group in the nozzle. The nozzle is longitudinally slotted as at B and its discharge end where it approaches the turbine wheel is curved as at B to conform generally to the curvature of the inner edge of the buckets A. The slots B and B of course communicate with the steam chest and the steam is conducted by it outwardly and discharged against these buckets A". Because the nozzle is merely a piece of machined metal rod it can easily be made with a high degree of accuracy and it thus is possible to provide with a cast steam chest and bracket a nozzle which will make a close and accurate tit and permit a minimum of spilling of steam from between the nozzle and the buckets. Any changes in size, shape and arrangement of parts can easily be compensated for by slight changes in the nozzle without interfering with any ofthe other more permanent parts. The nozzle can also be easily removed as it wears away and be replaced without interfering with any of the permanent parts.

C is a return passage block mounted on the bracket A so as to overhang the two groups of turbine buckets. This block is removably held in position by screws 0. It has cut in the face opposed to the periphery Iatented Nov. 15, 1921.

of the turbine wheel, a series of separate inclined circular grooves arranged. in a plurality of groups separated by diaphragms C C These grooves are so positioned that they catch the steam as it flows from the buckets-A giving it a 180 degree change in direction and discharging it against the buckets A, the idea being that the steam flow is so great that as its direction is changed it tends to seek the outer walls of these guide passages and thus the incoming steam does not interfere with the outgoing steam. This guide passage block being removable may also be easil changed to compensate for wear or to make corrections in adjustment.

It will be evident that T have illustrated an operative device still many changes might be made both in size, shape and arrangement of parts without departing materially from the spirit of my invention, and I wish therefore that my drawings be taken as in a sense diagrammatic.

The use and operation of my invention are as follows:

The nozzle will normally be placed in position in the steam chest and locked by means'of the pin. The closure at the back end of the steam chest will be closed by the plug. The guide passage block will be bolted in position and the entire assembly will then be mounted on wall of the housing andythe steam line connected up. The turbine bucket will then be brought into work ing relation with the nozzle and guide passage block so that the nozzle as above suggested discharges against the inner periphery of one group of buckets, then when steam is turned on this steam passes out from the steam chest through the nozzle and is discharged against that group of buckets, Passing through these buckets it will have its direction of flow reversed and will be discharged from them against the guide passage block. The guide passages will return the steam around the edge of the wheel and discharge it in the opposed direction inwardly along a radial line against the other set of buckets after which it will pass into the exhaust, the idea being that each set of buckets gets one impulse from each steam particle, the steam passing outwardly along ing a solid cylindrical nozzle member, a socket therefor, means for supplying a motive fluid to the socket, the nozzle being longitudinally slotted along one side, the slot communicating with the steam supply.

2. A nozzle for a steam turbine comprising a solid cylindrical nozzle member, a socket therefor, means forsupplying a motive fluid to the socket,the nozzle being longitudinally slotted along one side, the slot communicating with the steam supply, the end of the nozzle and the part of the side'thereof where the slot is loeatedbeing shaped to conform to the contour of the turbine wheel.

3. A nozzle for a steam turbine comprising a solid cylindrical nozzle member, a socket therefor, means for supplying a motive fluid to the socket, the nozzle being longitudinally slotted along one side, the slot communicating with the steam supply, means for rigidly and detachably holding the nozzle in the socket.

4. A nozzle for a steam turbine comprising a solid cylindrical nozzle member, a socket therefor, means for supplying a motive fluid to the socket, the nozzle being longitudinally slotted along one side, the slot communicating with the steam supply, the end of the nozzle and the part of the side thereof where the slot is located being shaped to conform to the contour of the turbine wheel, means for rigidly and detachably holding the nozzle in the socket.

5. A nozzle for a steam turbine comprising a solid cylindrical nozzle member, a socket therefor, means for supplying a motive fluid to the socket, the nozzle being longitudinally slotted along one side, the slot communicating with the steam supply, means for rigidly and detachably holding the nozzle in the socket, said means comprising a holding pin driven through the wall of the socket and engaging a groove in the nozzle piece.

6. A nozzle for a steam turbine comprising a solid cylindrical nozzle member, a socket therefor, means for supplying a motive fluid to the socket, the nozzle being longitudinally slotted along one side, the slot communicating with the steam supply,'the end of the nozzle and the part of the side thereof where the slot is located being shaped to conform to the contour of the turbine wheel, means for rigidly and detachably holding the nozzle in the socket, said means comprising a holding pin driven through the wall of the socket and engaging a groove in the nozzle piece.

7. A nozzle for a steam turbine comprising a solid cylindrical nozzle member, a socket therefor, means for supplying a motive fluid to the socket, the nozzle being longitudinally slotted along one side, the slot communicating with the steam supply, the nozzle being partially embedded within the socket so that the wall of the socket formsassumes a closure for the slotthroughout a portion of its length.

8. A nozzle for a steam turbine comprising a solid cylindrical nozzle member, a socket therefor, means for supplying a motive fluid to the socket, the nozzle being longitudinally slotted along one side, the slot communicating with the steam supply, the end of the nozzle and the part of the side thereof where the slot is located being haped to conform to the contour of the turbine wheel, the nozzle being partially embedded within the socket so that the wall of the socket forms a closure for the slot throughout a portion of its length.

9. A nozzle for a steam turbine comprising a solid cylindrical nozzle member, a socket therefor, means for supplying a motive fluid to the socket, the nozzle being longitudinally slotted along one side, the slot communicating with the steam supply, the slot in the nozzle being of substantially constant width but of constantly increasing depth from the socket end outwardly.

10. A nozzle for a steam turbine comprising a solid cylindrical nozzle member, a socket therefor, means for supplying a motive fluid to the socket, the nozzle being longitudinally slotted along one side, the slot communicating with the steam supply, the end of the nozzle and the part of the side thereof where the slot is located being shaped to conform to the contour of the turbine wheel, the slot in the nozzle being of substantially constant width but of constantly increasing depth from the socket end outwardly.

11. In a steam turbine a wheel having a pair of separate bucket rings upon the periphery thereof, a nozzle adapted to discharge steam radially and outwardly through the buckets of one ring, a guide passage block in opposition to the outer periphery of both bucket rings arrangedto return the outwardly moving steam 1nwardly through the buckets of the other ring, a bracket removably mounted in the turbine housing, the guide passage block being removably mounted on the bracket.

12. In a steam turbine a wheel having a pair of separate bucket rings upon the periphery thereof, a nozzle adapted to discharge steam radially and outwardly through the buckets of one ring, a guide passage block in opposition to the outer periphery of both bucket rings arrangedto return the outwardly moving steam inwardly through the buckets of the other ring, the nozzle being removably socketed in the bracket.

13. In a steam turbine a wheel having a pair of separate bucket rings upon the periphery thereof, a nozzle adapted to discharge steam radially and outwardl through the buckets of one-ring, a'guide pas sage block in opposition to the outer pa riphery of'both bucket rings arranged to return the outwardly moving steam inwardly through the buckets of the other ring,'the nozzle being removably socketed in the bracket and the guide passage block being .removably mounted on the bracket.

14:. In a steam turbine a wheel having a pair of separate bucket rings upon the periphery thereof, a nozzle adapted to discharge steam radially and outwardly through the buckets of one ring,v a guide passage block in opposition to the outer periphery of both bucket rings arranged to return the outwardly moving steam inwardly through the buckets of the other ring, a bracket removably mounted on the turbine housing, a steam chest associated therewith, the nozzle being socketed in said steam chest and removably positioned therein,

1.5.A nozzle member for steam. turbines comprising a solid cylindrical part, one end of such part having flattened socket engaging surfaces, the other end and the side adjacent such end being curved to fit the contour of the steam turbine, there being a straight sided tapered slot of depth increasing outwardly toward the passage end. 16. In a steam turbine a guide passage block comprising a segmental member shaped to conform to the curvature of the bucket wheel and a plurality of guide passages located in the curved face of said block, the bracket being itself removably mounted on the turbine.

17. In a steam turbine a bracket removably mounted on the turbine frame having a steam passage therein, a steam chest in the bracket associated with the passage and a nozzle detachably mounted and adapted to discharge steam from the steam chest against the bucket wheel, said nozzle and associated parts being located inside of the periphery of and in substantially the same plane as the bucket, the bracket projecting outwardly along one side of the bucket wheel, and a guide passage block removably mounted on the bracket overlying and in the same plane as the bucket ring, the nozzle being held in the steam chest by means of a removable pin which looks it against longitudinal move I ment.

18. In a steam turbine a bracket removbucket, the bracket projecting outwardly along one side of the bucket Wheel. and a guide passage block removably mounted on the bracket overlying and in the same plane as the bucket ring, the guide passage block having a plurality of open semicircular in olined guide passages in the face thereof adapted to take the steam as it travels radially outwardly through the buckets and return it radially inwardly.

Signed at Chicago, county of Cook and State of Illinois, this seventh day of April,

CHARLES W. DAKE. 

